! Math Dice Rules - Marbles: The Brain Store How to play Math Dice - Game Rules from Marbles the Brain Store ! How to Play Math Dice What is Math Dice? Math Dicemakes mathema=cal concepts fun for young and old alike. This 3D math game challenges players to get closest to the target number by crea=ng diﬀerent equa=ons using addi=on, subtrac=on, mul=plica=on, division and powers. Math Dice includes two target dice, three scoring dice, a lesson booklet and a storage bag for taking your mad mathema=cal skills on the road. In our ever-‐so-‐humble and arithme=c-‐loving opinions, math got a bad rap. Kids swear they’ll never need it. Parents insist they don’t use it. And grandparents tell stories of walking up a snowy hill barefoot while calcula=ng the distance to school with nothing but an abacus. Game Play Overview Roll the two 12-‐sided dice. Mul=ply the two numbers on the dice to get a target number. The players roll the three 6-‐sided dice and must use those three numbers with a mathema=cal operator (+,-‐,x,÷, and even roots or exponents) to reach as close as possible to the target number. ! How to Win Math Dice The player who gets closest to the target number is the winner. Where to Get Math Dice Don’t have it or need a new copy? Get Math Dice at Marbles the Brain Store online, or play and buy at a Marbles store near you. NEXT: Check out the following manufacturer’s instructions and get playing Math Dice! How to Play Math Dice page 2 Math Dice Rules - Marbles: The Brain Store Parents and Teachers MathDice™ is a great game in the classroom and for home schooling. To learn more about the education behind MathDice™, come visit our website at— 2 12 1 1 1 0 1 3 Object: Use your math skills to combine three numbers to match, or come closest to, the Target Number. 2 5 2 3 WOW! H EX A M PL E Solve Many Ways. 1 TARGET NUMBER SCORING NUMBERS ANSWER EQUATION 8 2 4 6 6+4–2 2x6–4 ( 2 4 )+ 6 2 2 2x3–4 2 3 4 3 (2 x 4) 2 x (4 – 3) 2(4–3) Using the Scoring Numbers, create an equation to calculate the closest number possible to the Target Number.Your answer could be above the Target Number, below the Target Number, or hit the Target Number exactly, depending on the numbers rolled and what you do with them. (Remember, the Target Number is 28 and the Scoring Numbers are 5, 2, and 3.) Player I shouts, “25!” (2 + 3) x 5 Player 2 shouts, “30!” 2 x 3 x 5 Player I shouts, “29!” 25 – 3 Player 2 shouts, “27!” (5 – 2)3 Player I shouts, “28!” 52 + 3, hits the Target Number exactly, and wins the point. To create your equation, use each Scoring Number once and only once, along with any combination of the following operations: addition, subtraction, multiplication, division, powers, and roots.You may use the Scoring Numbers and operators in any order. Yeah! 19 WOW! G A M PL E For 2 or More Players Play competitively, in teams, or practice on your own. Then roll the three 6-sided Scoring Dice to establish three Scoring Numbers. In the example below, a 5, 2, and 3 are your Scoring Numbers. EX © 2003 ThinkFun Inc. Ritchie’s other hope is that MathDice™ will make math more fun and accessible for the generation of kids now in elementary and secondary schools across the country and around the world. 7 x 4 = 28 Ages 8 to Adult Fun for players of all math levels ThinkFun Inc. 1321 Cameron Street Alexandria,VA 22314 USA www.ThinkFun.com 4 9 8 7 6 Contents: • Two 12-sided Dice • Three 6-sided Dice • Travel Bag • Instruction Booklet 5 ™ The Fast Fun Game of Mental Math www.ThinkFun.com/mathdice. Where It Started MathDice™ was invented by Sam Ritchie, as a “Design a Game” math workshop project for his sixth grade class. Now a teenager, Ritchie is on the United States Junior World Sprint Kayaking team, and hopes to compete in the Olympics some day. To Play: Start by rolling the two 12-sided Target Dice. Multiply them together to establish a Target Number. In the example below, when you roll a 7 and a 4 the Target Number is 28. 1 Solve Three Ways. TARGET NUMBER SCORING NUMBERS ANSWER EQUATION 12 2 3 6 2x3+6 (6 – 2) x 3 2 16 2 4 6 (2 x 6) + 4 (6 – 2) x 4 3 22 24 + 6 2 4 6 In our example, two players might shout out the following… 42 + 6 4x6–2 3x4–2 2 33 3 5 6 5x6+3 (5 + 6 ) x 3 3 15 2 3 6 2x6+3 32 + 6 4 28 The fun and ﬂexibility of this game is in combining the three Scoring Numbers in the most creative ways to get the best answer. 25 – 4 2 4 5 (2 + 5) x 4 5 81 3(6–2) 2 3 6 (3 + 6)2 D SCORING NUMBERS ANSWER EQUATION 1 9 1 2 2 (1 + 2)2 2 16 2 2 2 (2 + 2)2 EX A PL E M POWERS TARGET NUMBER 3 25 1 2 6 (6 – 1)2 4 36 2 2 3 (2 x 3)2 5 11 2 2 3 32 + 2 6 14 2 2 4 42 – 2 7 18 2 2 6 8 27 2 3 3 32 x 3 9 32 2 2 3 2 2+3) 10 81 1 3 5 35 B 5 The player with the closest number at the end of the point must state the equation he or she used to reach the answer. If it is correct, the point is won. If incorrect, the player with the next closest answer must state his or her equation, and gets the point if it is correct. The first player to win four points wins the game. Note: If you are playing competitively, MathDice™ is a “mental math” game…pencil, paper, or a calculator are not allowed. 7 SCORING NUMBERS ANSWER EQUATION 1 1 1 3 4 1 x (4 – 3) 2 2 1 1 1 1 x (1 + 1) 3 3 2 3 3 2x3–3 For a more cooperative environment, choose from the following: 4 4 2 4 4 2x4–4 5 5 1 1 6 1 x (6 – 1) 6 6 3 4 6 3x4–6 7 7 2 3 5 2x5–3 • Everyone who can match the best answer given on a turn, gets a point for that turn. • Relax time constraints. • Allow use of pencil and paper or calculators. • Work together to find as many answers as you can that are close to the Target Number. • Have fun exploring the numbers and their patterns! EX A PL E M between 2 and 24. This version makes a good game for players who have confidence in their adding/ subtracting/multiplying skills, but are not yet comfortable with more advanced operations. TARGET NUMBER 8 8 2 4 4 (4 – 2) x 4 9 9 3 3 6 3 x (6 – 3) 10 10 2 2 3 (2 + 3) x 2 3 4 6 43 + 6 2 9 2 4 6 3 32 1 2 6 2(6–1) 4 33 3 3 6 33 + 6 5 72 3 3 6 6 108 3 6 6 3x6x6 7 80 1 3 4 34 – 1 8 32 2 3 4 9 121 3 4 5 10 2 3 3 5 EX A M PL E 70 6 Simpler Versions of Play: MathDice™ is a fun, educational game. The rules above describe competitive play. For your enjoyment, please feel free to relax the rules in any way that suits your group of players. C SCORING NUMBERS 1 1 3 3 6 2 2 3 4 6 3 3 1 1 6 4 4 2 2 5 5 5 2 4 6 6 6 4 4 5 7 7 3 5 6 8 8 3 4 6 9 9 2 6 6 10 10 3 5 6 To lower the average difficulty of the calculations, reduce the range of the Target Numbers. To do this, you may: 9 8 MathDice™ and the Flexibility of Numbers: Numbers are incredible. As you play MathDice™ and your skills improve, you will come to discover patterns and relationships that will astound you. Really! To get you started down this path, we’ve developed eight Practice Tables that you can use to hone your skills. The ﬁrst ﬁve tables each focus on a different operation, and the ﬁnal three WOW! Tables show examples with multiple ways of reaching the Target Number. Once you work your way through these stretching drills, you’re ready for action! 10 53 – 4 3 (3 + 5) DIVISION TARGET NUMBER • Roll only one 12-sided die to establish a Target Number in the range between 1 and 12. This version makes a good game for players who are more confident with addition and subtraction skills, and just starting to get a mastery of multiplication. ( MULTIPLICATION 1 If the Target Number hasn’t been reached, other players then have 15 seconds to respond with a new answer that is closer to the Target Number. (The player with the current best answer must remain silent while the other players try for a better answer.) This play continues, with an additional 15 seconds added after each improvement, until one player hits the Target Number exactly, the other players forfeit the point, or the time limit for calculating is reached. • Roll two 12-sided dice, and add the two numbers together, to establish a Target Number in the range ( –1) ANSWER EQUATION E 2x3+4 SCORING NUMBERS M PL 2 3 4 ROOTS AND BEYOND TARGET NUMBER ANSWER EQUATION A ADDITION / SUBTRACTION 1510 MATH DICE BOOKLET TARGET NUMBER SCORING NUMBERS ANSWER EQUATION 1 1 1 2 2 1+2–2 COLOR: PRINTS BLACK 2 2 3 4 5 3+4–5 PAPER STOCK: 3 3 1 1 5 5–1–1 4 4 1 2 3 2+3–1 5 5 1 2 6 6+1–2 6 6 1 3 4 3+4–1 7 7 2 2 3 2+2+3 8 8 3 5 6 5+6–3 9 9 2 3 4 2+3+4 10 10 2 6 6 6+6–2 E ANSWER EQUATION E PL 10 SCORING NUMBERS Scoring: Your goal is to beat your opponent by getting closer to the Target Number, faster. Once you have an answer you are satisfied with, call it out. The first player to call out an answer, claims that number. M TARGET NUMBER Note how each number is used once and only once in each equation. This rule is especially important to understand when the numbers are used as powers. The player who hit 28 used the “2” to raise the 5 to the second power; the player who reached 27 used the “3” to raise (5 – 2) to the third power. A E PL M A EX 1 Solve Two Ways. EX WOW! F 4 EX A 3 ThinkFun Inc. A Binary Arts® Company 1321 Cameron Street Alexandria, VA 22314 USA May 9, 2005 How to Play Math Dice page 3

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